A cache of secret memos between Prince Charles and senior government ministers has been released after a 10-year legal battle, offering the clearest picture yet of the breadth and depth of the heir to the throne’s lobbying at the highest level of politics.

The 27 memos, sent in 2004 and 2005 and released only after the Guardian won its long freedom of information fight with the government, show the Prince of Wales making direct and persistent policy demands to the then prime minister Tony Blair and several key figures in his Labour government.

In a single letter in February 2005, he urged a badger cull to prevent the spread of bovine tuberculosis – damning its opponents as “intellectually dishonest”; lobbied for his preferred person to be appointed to crack down on the mistreatment of farmers by supermarkets; proposed his own aide to brief Downing Street on the design of new hospitals; and urged Blair to tackle a European Union directive limiting the use of herbal alternative medicines use in the UK.

Political Scrapbook describes the lobbying about EU farm subsidies that benefited the Dutchy.